Definations

Author 

An author is narrowly defined as the originator of any written work and can thus also be described as a writer (with any distinction primarily being an implication that an author is a writer of one or more major works, such as books or plays). More broadly defined, an author is "the person who originated or gave existence to anything" and whose authorship determines responsibility for what was created.^[1] The more specific phrase published author refers to an author (especially but not necessarily of books) whose work has been independently accepted for publication by a reputable publisher.


editor
a person who corrects or changes pieces of text or films before they are printed or shown, or a person who is in charge of anewspaper or magazine:


subscriber

1. To pledge or contribute (a sum of money).

2.

a. To sign (one's name) at the end of a document, especially to attest to or authenticate it.

b. To sign one's name to (a document) in attestation, testimony, or consent: subscribe a will.

3. To purchase or claim the shares of (a new issue of stock, bonds, or other securities): a bond offering that is fullysubscribed.

v.intr.

1.

a. To contract to receive and pay for a certain number of issues of a publication, for access to a website that isprotected by a paywall, for tickets to a series of events or performances, or for a utility service, for example.

b. To agree to an ongoing arrangement by which one receives online content, as from a specific website or aspecific user on a website.

2. To promise to pay or contribute money: subscribe to a charity.

3. To purchase or claim shares of a new issue of stock, bonds, or other securities: an investor who subscribed for100 shares.

4. To feel or express hearty approval: I subscribe to your opinion. See Synonyms at assent.

5. To sign one's name to a document.

contributor

1.

a person who contributes money, assistance, etc.

2.

a person who contributes an article, story, etc., to a newspaper,magazine, or the like.

Administrator

1. 1. :  a person legally vested with the right of administration of an estate
2. 2a :  one who administers especially business, school, or governmental affairsb :  a priest appointed to administer a diocese or parish temporarily